[core] Updating documentation

Adding a checkconfig for Hive warehouse.
Adding new tours.
Re-wording tour welcome message.
HUE-1978 [beeswax] Cancel whole multi query execution
HUE-1918 [core] Login page should accept longer password
HUE-2008 [pig] Clicking on the stop button should stop on the frontend

Added $.post fail handler
Moved New script label
HUE-2013 [metastore] Write permission instead of read permission

Remove read permission in a data migration.
[core] Update configuration check path color

Changed from red to Hue blue
[useradmin] Hide LDAP sync buttons when LDAP is not configured
HUE-1884 [core] Limit number of history documents
HUE-1884 [core] Split tag view in shared and not shared ones

Split into My Projects and Shared with me on the UI
Added 'Shared by' on shared tags